Pressure adjusting device for prestorage chamber of dry quenching furnace

Abstract

The utility model discloses a pressure regulating device for a prestorage chamber of a dry quenching furnace, which relates to the technical field of coked dry quenching production and comprises the dry quenching furnace, the prestorage chamber is formed in the dry quenching furnace, a circulating fan is arranged on one side of the dry quenching furnace, an air outlet of the circulating fan is communicated with the prestorage chamber, and an air outlet of the circulating fan is communicated with the prestorage chamber. An air outlet of the circulating fan is connected with a rear diffusion flue gas pipeline, the rear diffusion flue gas pipeline is connected with a frequency conversion fan, and the pressure in the pre-storage chamber is adjusted and controlled through the frequency conversion fan. The pressure adjusting device for the prestorage chamber of the dry quenching furnace is high in adjusting timeliness, and the adjusting process is convenient and efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of coking dry quenching production, in particular to a pressure regulating device for a pre-storage chamber of a dry quenching furnace. Background Art

[0002] The pre-storage chamber of the CDQ furnace is located at the top of the furnace. Its main function is to store red coke and continuously supply the heat of the red coke to the cooling chamber, reducing the time interval between coke loading and the fluctuation of blast temperature, and continuously supplying heat to the boiler, thereby ensuring the stability of steam parameters. When the red coke is stored in the pre-storage chamber, the volatilization of the gas in the coke will produce carbon monoxide, hydrogen and other combustible gases, which will continue to rise and remain in the cone top space of the pre-storage chamber. If the pressure in the pre-storage chamber is too high, when the furnace cover is opened for loading coke, these combustible gases will emerge from the furnace, which may easily cause deflagration or explosion. Moreover, a large amount of smoke and dust will leak into the air, causing environmental pollution. If the pressure in the pre-storage chamber is too low, it may easily cause a large amount of air to be sucked into the pre-storage chamber when the furnace cover is opened for loading coke, causing the coke in the pre-storage chamber to burn.

[0003] Therefore, in order to ensure the safe operation of the CDQ system, the pressure in the pre-storage chamber must be reasonably controlled, and the circulating air volume and coke discharge volume must be relatively stable, that is, the pressure at each point in the CDQ circulation system must remain relatively stable.

[0004] like Figure 1 As shown, the pressure of the pre-storage chamber of the existing dry quenching furnace is regulated by a regulating valve 8. By adjusting the opening of the pre-storage chamber pressure regulating valve 8, the pressure of the pre-storage chamber of the dry quenching furnace is ensured to be in a slightly negative pressure state. However, the regulating valve regulation method has the disadvantages of poor regulation timeliness, inconvenient operation, and low regulation efficiency. Utility Model Content

[0005] The utility model aims to provide a dry quenching furnace pre-storage chamber pressure regulating device to solve the problems existing in the above-mentioned prior art, with high regulation timeliness and convenient and efficient regulation process.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model provides a dry quenching furnace pre-storage chamber pressure regulating device, comprising a dry quenching furnace, wherein a pre-storage chamber is formed in the dry quenching furnace, a circulating fan is arranged on one side of the dry quenching furnace, an air outlet of the circulating fan is communicated with the pre-storage chamber, a rear-dispersing smoke pipe is connected to the air outlet of the circulating fan, a variable frequency fan is connected to the rear-dispersing smoke pipe, and the pressure in the pre-storage chamber is regulated and controlled by the variable frequency fan.

[0008] Preferably, a dust collector is provided between the rear-dispersion flue gas duct and the variable frequency fan.

[0009] Preferably, the rear flue gas duct at the air outlet end of the variable frequency fan is directly connected to the coking vent gas duct of the coke oven desulfurization system.

[0010] Preferably, two variable frequency fans are provided, and the two variable frequency fans are connected in parallel to the rear-dispersion smoke duct.

[0011] Compared with the prior art, the utility model has achieved the following technical effects:

[0012] The dry quenching furnace pre-storage chamber pressure regulating device provided by the utility model regulates and controls the pressure in the pre-storage chamber by means of a variable frequency fan. Compared with the traditional regulation method using a regulating valve, the regulation is more timely and the regulation process is convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 This is a structural block diagram of the prior art using a regulating valve to regulate the pressure of the pre-storage chamber;

[0015] Figure 2 The utility model provides a structural block diagram of the dry quenching furnace pre-storage chamber pressure regulating device.

[0016] In the figure: 1- dry quenching furnace, 2- pre-storage chamber, 3- circulating fan, 4- post-dispersion flue gas duct, 5- variable frequency fan, 6- dust collector, 7- coke oven desulfurization system, 8- regulating valve, 9- pressure gauge. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] The utility model aims to provide a dry quenching furnace pre-storage chamber pressure regulating device to solve the problems existing in the prior art, with high regulation timeliness and convenient and efficient regulation process.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] like Figure 2 As shown, the present embodiment provides a dry quenching furnace pre-storage chamber pressure regulating device, comprising a dry quenching furnace 1, a pre-storage chamber 2 is formed in the dry quenching furnace 1, a circulating fan 3 is arranged on one side of the dry quenching furnace 1, an air outlet of the circulating fan 3 is connected to the pre-storage chamber 2, a rear-dispersion flue gas duct 4 is connected to the air outlet of the circulating fan 3, a variable frequency fan 5 is connected to the rear-dispersion flue gas duct 4, and the pressure in the pre-storage chamber 2 is regulated and controlled by the variable frequency fan 5.

[0021] By setting up the rear-dissipation flue gas duct 4 and the variable frequency fan 5, the circulating gas entering the dry quenching furnace 1 is short-circuited. When the bypass flow (the flow of the rear-dissipation flue gas duct 4) increases, it is equivalent to a positive pressure section leakage, and the pressure of the pre-storage chamber 2 will decrease; otherwise, the pressure of the pre-storage chamber 2 will increase. The speed of the variable frequency fan 5 is controlled by frequency regulation, and it is interlocked with the pressure measuring point (pressure gauge 9) of the dry quenching furnace pre-storage chamber to ensure that the pressure is slightly negative. The pressure in the pre-storage chamber 2 is regulated and controlled by the variable frequency fan 5. Compared with the traditional regulation method using the regulating valve 8, the regulation is more timely and the regulation process is convenient and efficient. Considering that the variable frequency fan 5 is closely related to the pressure regulation of the pre-storage chamber 2, the variable frequency fan 5 is designed as a primary load.

[0022] In this embodiment, a dust collector 6 is arranged between the post-dispersion flue gas duct 4 and the variable frequency fan 5. The post-dispersion flue gas duct 4 at the air outlet of the variable frequency fan 5 is directly connected to the coking venting gas duct of the coke oven desulfurization system 7. In conventional design, the post-dispersion flue gas of the circulating fan 3 is connected to the subsequent coke oven desulfurization system 7 in the form of a dust hood. After the dry coke quenching device is put into operation, due to the open dust hood, external air will enter the duct, causing the oxygen content of the coke oven flue gas to be too high (over 8%). After the external air enters, the temperature at the connection point of the post-dispersion flue gas duct 4 will be reduced. When the temperature drops below the acid dew point, the post-dispersion flue gas duct 4 will be corroded. This device connects the rear emission flue gas duct 4 at the outlet end of the variable frequency fan 5 directly to the coking emission gas duct of the coke oven desulfurization system 7 to prevent the entry of cold air from the outside, thereby solving the problems of excessively high oxygen content (over 8%) in the coke oven flue gas, low temperature at the connection point of the rear emission flue gas duct of the dry coke quenching circulating fan, and corrosion in the rear emission flue gas duct of the circulating fan.

[0023] In this embodiment, two variable frequency fans 5 are provided, and the two variable frequency fans 5 are connected in parallel to the rear flue gas duct 4. The pressure of the pre-storage chamber 2 is adjusted by adjusting the speed of the variable frequency fans 5. Two variable frequency fans 5 are provided, and when one of the variable frequency fans 5 fails, the other variable frequency fan 5 is started to ensure the normal production of the dry quenching furnace 1.

[0024] The exhaust gas after the CDQ circulating fan is sent to the coke oven desulfurization system for treatment, and insulation measures should be taken for the dust removal system (including the pre-dust collector and dust removal pipeline).

[0025] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A dry quenching furnace pre-storage chamber pressure regulating device, comprising a dry quenching furnace, a pre-storage chamber formed in the dry quenching furnace, a circulating fan is arranged on one side of the dry quenching furnace, and an air outlet of the circulating fan is connected to the pre-storage chamber, characterized in that: The air outlet of the circulation fan is connected to a post-dispersion smoke duct, and the post-dispersion smoke duct is connected to a variable frequency fan, through which the pressure in the pre-storage chamber is regulated and controlled.

2. The dry quenching furnace pre-storage chamber pressure regulating device according to claim 1, characterized in that: A dust collector is arranged between the rear-dispersed smoke duct and the variable frequency fan.

3. The CDQ furnace pre-storage chamber pressure regulating device according to claim 2 is characterized in that: The rear flue gas duct at the air outlet end of the variable frequency fan is directly connected to the coking vent gas duct of the coke oven desulfurization system.

4. The CDQ furnace pre-storage chamber pressure regulating device according to claim 1, characterized in that: The variable frequency fans are provided with two, and the two variable frequency fans are connected in parallel to the rear-dispersing smoke duct.

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